W3/0120 Water Vapor Transmission Rate Tester is based on the cup method, and is professionally applicable to the water vapor transmission rate test of plastic films, composite films, sheets and other materials used in medical and other industry. By testing the water vapor transmission rate, the technical index of the materials could be controlled to meet the requirements for production.
Technical Specifications
| Specifications | Film Test |
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| Test Range | 0.1~10,000 g/m2·24h (standard) |
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| Number of Specimen | 1~12 (with independent test results) |
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| Test Accuracy | 0.01 g/m2·24h |
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| Resolution | 0.0001 g |
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| Temperature Range | 15°C~65°C (standard) |
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| Temperature Accuracy | ±0.1°C(standard) |
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| Humidity Range | 40%RH~95%RH (standard is 90%RH) |
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| Humidity Accuracy | ±1%RH |
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| Air Velocity | 0.5~2.5 m/s (customization is available) |
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| Test Area | 33 cm2 |
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| Specimen Thickness | ≤ 3 mm (customization is available for other thickness) |
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| Specimen Size | Φ74 mm |
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| Volume of Test Chamber | 80 L |
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| Gas Supply | Air |
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| Gas Supply Pressure | 0.6 MPa |
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| Port Size | Φ6 mm PU Tubing |
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| Instrument Dimension | 826 mm (L) x 726 mm (W) x 702 mm (H) |
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| Power Supply | AC 220V 50Hz |
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| Net Weight | 114 kg |
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Principle
Under a certain test temperature, a constant humidity difference is generated between two sides of the test specimen. The water vapor permeates through the specimen and into the dry side. By measuring the weight changes of the test dish in different time, water vapor transmission rate and other parameters can be obtained.
Standards
This test instrument conforms to the following standards:
ISO 2528, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 00092003
This instrument is applicable to the determination of water vapor transmission rate of:
| Basic Applications | Films
Including plastic films, plastic composite films, paper-plastic composite films, geomembranes, coextruded films, aluminized films, aluminum foils, aluminum foil composite films, breathable water-proof films and many other film materials |
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Sheeting
Including engineering plastics, rubber, building materials and many others, e.g. PP, PVC and PVDC |
Paper and Paper Board
Including paper and paper board |
Textiles and Nonwovens
Including textiles and non-woven materials, e.g. waterproof breathable fabric, non-woven fabric for diapers and hygienic products |
| Extended Applications | Inverted Cup Method
Mount film or sheeting in test dish, cover upper surface of specimen with distilled water, and make the lower side in certain humidity. Generate a constant humidity difference between two sides; water vapor permeates through specimen and measure weight changes in different time to obtain the water vapor transmission rate.
NOTE: inverted cups are required |
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Artificial Skin
Artificial skin has to meet standard requirements for water vapor transmission rate to ensure better breath performance. This instrument can be used to test water vapor permeability of artificial skin |
Medical Products and Accessories
Including plasters, aseptic wound protecting films, face masks and scar sticks |
Solar Back-Sheets
Including solar back-sheets |
LCD Monitor Films
Including LCD monitor films |
Paint Films
Test water vapor permeability of various sorts of paint films |
Cosmetics
Test water vapor permeability of cosmetics |
Biodegradable Films
Test water vapor permeability of various sorts of biodegradable films, e.g. starch-based packaging films |